gui: Default window size to 2/3 of current screen
gui: Default window size to 2/3 of current screen

equalsraf/neovim-qt,ngkaho1234/neovim-qt,0x90sled/neovim-qt,equalsraf/neovim-qt,ravloony/neovim-qt,ngkaho1234/neovim-qt,Pireax/neovim-qt,0x90sled/neovim-qt,Pireax/neovim-qt,equalsraf/neovim-qt,equalsraf/neovim-qt,ravloony/neovim-qt,ravloony/neovim-qt,0x90sled/neovim-qt,Pireax/neovim-qt,ngkaho1234/neovim-qt